CHAPTER VI. A Census is Ordered .-- Dissolution of Pitt's Administration .-- Impeachment of Lord Melville .-- Introduction of Lord Ellenborough into the Cabinet .-- Abolition of the Slave-trade .-- Mr.Windham's Compulsory Training Bill .-- Illness of the King, and Regency .-- Recurrence to the Precedent of 1788-'89 .-- Death of Mr.Perceval .-- Lord Liverpool becomes Prime-minister .-- Question of Appointments in the Household .-- Appointment of a Prime-minister..